Hi there, i have a line graph that requires to use one color for up to 4 lines but want to differentiate them with different line styles. I searched for an answer but the closet match is to add some additional dots in the graph and change their colors to white, but this change will apply to all lines in the graph, which means still cannot differentiate lines of the same color. I was wondering if Tableau have this function, and if yes, how to do this. Thanks a lot.

Thanks Ramon. This was the post i found the closet match, but my data contains 300K+ rows and growing by 30K+ rows each time. This approach will make my database many times larger, and creating data for those new dots will affect results on other graphs and tables. I was wondering if Tableau has function similar to excel's graph tools where user can apply different line styles or markers to different lines. Thanks.

No, not possible unfortunately outside of the linked method - I would perhaps look for other ways to highlight the lines you are interested in (select a parameter to show that in orange, related in blue, others in grey for example)